MAC parsing issues

[marco91sol]

Dear all, I am running the following command for merging assemblies: php ./MAC.php ~/assembly_1 ~/assembly_2 ~/IlluminaSRs_paired1.fastq ~/IlluminaSRs_paired2.fastq ~/MAC_output/

ERROR: Could not parse delta file, ~/MAC_output//Mix2.delta error no: 400 ERROR: Could not parse delta file, ~/MAC_output//Mix2.filter error no: 402

How could I solve it?